/**
 * Copyright 2009-2020 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.ibatis.submitted.primitive_result_type;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.Reader;

public class IbatisConfig {

	private static SqlSessionFactory sqlSessionFactory;

	private IbatisConfig() {
	}

	private static synchronized void init() {
		if (sqlSessionFactory == null)
			try {
				final String resource = "org/apache/ibatis/submitted/primitive_result_type/ibatis.xml";
				Reader reader = Resources.getResourceAsReader(resource);
				sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
	}

	public static SqlSession getSession() {
		if (sqlSessionFactory == null) {
			init();
		}
		return sqlSessionFactory.openSession();
	}

	public static SqlSessionFactory getSqlSessionFactory() {
		init();
		return sqlSessionFactory;
	}

}
